18"w X 8"h Aluminum Adjustable Return/Supply HVAC Air Grille Powder Coated Efficient Airflow Design: The slots

Efficient Airflow Design: The slots are meticulously angled to diversify airflow in two directions

875" width X 15

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The first number in a grille size represents the width

18"w X 8"h Aluminum Adjustable Return/Supply HVAC Air Grille Powder Coated Efficient Airflow Design: The slots+ Product Details Size 18"w X 8"h is the size for the duct opening measurement only, actual front end outer dimensions are approximately 19. 85" width X 9. 85" height. High Quality Rigid aluminum construction with counter sunk screw holes (screws included) and no sharp edges. Installation Location Sidewall and ceiling. Design Unrestricted airflow for your HVAC system adjustable one way louver with full horizontal airflow directional control single